Peel the sweet potatoes and then cut into 1/4" slices. The sweet potatoes darken quickly so you want to slice them just before using. Placing them in a bowl of cold water will help stop the darkening.

Melt the margarine in the bottom of a skillet over medium heat. Add the slice sweet potatoes.

Cook until browned on one side. Turn and then cover and cook for 5 minutes, turning the heat down to low.

Turn the potatoes and brown the other side over medium heat. Cover, turn heat on low, and cook for another 5 minutes or until the potatoes are tender. Do not overcook or the potatoes will become so soft.

Sprinkle with salt, add the pineapple and maple syrup to the sweet potatoes. Cook over medium heat until everything is heated thoroughly.